798817 has 4 divisors (see below), whose sum is σ = 840880. Its totient is φ = 756756.

The previous prime is 798799. The next prime is 798823. The reversal of 798817 is 718897.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 798817 - 2¹¹ = 796769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 798817.

It is not an unprimeable number, because it can be changed into a prime (798887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21003 + ... + 21040.

It is an arithmetic number, because the mean of its divisors is an integer number (210220).

2⁷⁹⁸⁸¹⁷ is an apocalyptic number.

It is an amenable number.

798817 is a deficient number, since it is larger than the sum of its proper divisors (42063).

798817 is a wasteful number, since it uses less digits than its factorization.

798817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42062.

The product of its digits is 28224, while the sum is 40.

The square root of 798817 is about 893.7656292340. The cubic root of 798817 is about 92.7859957687.

The spelling of 798817 in words is "seven hundred ninety-eight thousand, eight hundred seventeen".